Wireless receiving apparatus



Oct. 12 1926..

1 INVENTOR Hen stenber BY 3 3 Paul M Fig 4-.

Filed SegSt. 16, 1922 P M HENGSTENBERG wmznsss RECEIVINGAPPARATUS Pig. 3.

wrmsssss:

only partway across the punching 23, as shown, and defining a portion 28 which is supported at one end by the remaining unslit portion 29 and which is free to move at the other end. The portion 28 is designed to serve as a resilient contact element for the several switch units, as hereinafter explained.

The individual members of each of the switch units 18 and 19 are formed from the punching 23 of F 5 by transversely bending the same along the line of the slit to form the portion 28 into a flange, the free end of which is laterally resilient. The blank is further transversely bent at two points, say 30 and 31. as shown in Fig. 5, to provide a base portion 32. a second flange 33, which is parallel to the flange 28 and a transversely extending foot portion 34 to serve as a supporting element and as a corn tact element for the apparatus.

The base portions 32 of the members of each pair of units 18 and 19 are secured to the base 4 of the casing 1 by bolts 35 and 36, with the flanges 28 of each pair of members 21 and 22 disposed adjacently and in spaced relation. The several free ends of the flanges 28, which constitute the stationary contact elements for the switching units 18 and 19, may be so bent as to provide contact bearing surfaces 87, 1-38 and S9, 41. respectively.

The screws 36 may be extended through the molded casing 1 into the chamber 6 to provide a connection between the several coil terminals and the members of the sev eral switch units.

A switch rod 42 is slidably mounted between the several bent-back portions or flanges 28 constituting the stationary contact elements of the switch units 18 and 19, the switch rod being constrained to move in a longitudinal direction by the same. The rod 42 is further guided by a strap member 43. which is secured to the bottom side of the casing 1 by screws 44 at a point substantially midway between the switch units 18 and 19.

The switch rod 42 is further provided with a pair of conducting members 45 and 46 which constitute the movable contact ele ments of the switch units 18 and 19, whereby the stationary contact elements 28 of each pair of units may be open-circuited or short-circuited upon a movement of the switching rod 42. The conducting members 45 and 46 may take the form of rivets which are inserted in perforations 47 and 48. respectively, provided in the rod 42. the heads of the rivets serving as contact surfaces, as shown in the drawing.

lVhen the switch rod 42 is moved to actuate the heads of the conducting rivet members 45 and 46 into engagement with their co-operating contact surfaces 37, 38 and 39,

41, respectively, the opposite terminals of each coil are electrically connected and hence the coils are short-circuited. hen the switch rod 42 is moved to actuate the conducting rivet members 45 and 46 out of engagement with their co-operating stationary contact elements. the short-circuitcd condition of the coils is broken. A small pin 49, which is mounted on the rod 42 co-opcrates with the strap member 43 to so limit the motion of the rod 42 that the conducting rivet members 43 and 44 may he moved into on gagement with their co-opcrating stationary contact elements. but no farther. \Vhen the rod 42 is moved in the opposite direction to break the electrical contact between the several coil terminals, the motion of the rod is limited by the heads of the rivet member 46 engaging the strap member 43.

The arrangement shown in Fig. 4 illus tratcs one method of applying my invention to a wireless receiving cabinet 51, the wave length range of which it is desired to increase. t will be noted that the several supporting feet 34 for the casing are electrically connected to. and supported by. the binding posts 26 carried by the cabinet.

Among the several advantages character istic of the arrangement embodying my invention. attention is particularly directed to the ease of manufacturing the same in large quantities. In practice. for instance, it has been found that the manufacture of each element 23. constituting a supporting foot and a stationary contact element. may be made in two operations, namely the blanking operation, wherein the blank is cut to size. perforated and slit as shown. and the bending operation which may involve three movements to form the finished article.

While I have shown but one embodiment of my invention for the purpose of describing the same and illustrating its principle of operation. it is apparent that various changes and modifications may he made in the nature, the mode of operation and the details of construction without departing from the spirit of my invention. I desire, therefore. that only such limitations shall be imposed thereon as are indicated in the appended claims or demanded by the prior art.

I claim as my invention 1. In combination. a casi electrical ap paratus contained therein. a pair of spaced members secured to said casing and constituting opposite terminals tor said apparatus. the inner edges of said members being bent away from said casing to form adjacent contact surfaces. and a switch element movably mounted between said contact surfaces to establish an electrical contact there between.

2. In combination, an instrument, a pair of spaced members rigidly secured thereto,

each member having inner and outer bentback portions, the outer bent-back portions adapted to serve as supporting legs for the instrument, the inner bent-back portions adapted to serve as the stationary contact elements of a switch mechanism, and a rod.

carried by said instrument adapted to serve as the movable contact element of said, switch mechanism.

3. In combination, an instrument, a pair of spaced members rigidly secured thereto, each member having inner and outer bentback portions, the outer bent-back portions being provided with lateral extensions con stitutin the supportin feet for said instrument, the inner bentback portions being adapted to serve as flexible contact elements, and a switch element movably mounted between said elements in such manner as to be guided thereby and to establish an electrical contact therebetween.

4. In combination, a supporting element, a plurality of pairs of conducting members carried by said supporting element, each pair of members having bent-back portions disposed in spaced relation, the corresponding bent-back portions of the several airs being disposed in alignment, a rod sli ably mounted for longitudinal sliding movement between said bent-back portions and guided thereby, said rod having a perforation for each pair of members extending between the guided surfaces of said rod, and a conducting element disposed in each perforation and having opposite ends adapted to serve as contact surfaces.

5. In combination, a supporting element, a plurality of pairs of conducting members carried by said supporting element, each pair of members having bent-back portions disposed in spaced relation, the corresponding bent-back portions of the several pairs being disposed in alignment, a rod positioned between said bent-back port-ions and guided thereby, said rod having a perforation for each pair of bent-back portions and extending between the guided surfaces of said rod, conducting elements disposed in said perforations having opposite ends formed into clinching heads adapted to serve as contact elements for said pairs of bentback portions and means for slidably mounting said rod and for limiting the extent of motion thereof.

6. An element of a switch comprising a horizontally extending portion provided with bent-back side portions, one bent-back portion having a substantially horizontally extending section, the other bent-back portion being slit substantially along a portion 0 of the line of the bend.

7. A switching unit comprising a longitudinally reciprocable operating rod, a pair of insulated supporting feet disposed on opposite sides of said rod, means for electrically connecting said feet to an external circuit, elements on said feet providing contact surfaces engageable with said rod, and means for providing electrically connected contact surfaces on said rod in co-operative relation to said contact elements on said feet.

8. A switching unit comprising a longitudinally reciprocable operating rod of insulating material, two pairs of insulated supporting feet disposed on opposite sides of said rod, means for electrically connecting said feet to an external circuit, or circuits, elements on said feet providing contact surfaces engageable with said rod, and means for providing two pairs of electrically connected contact surfaces on said rod for co-operation with the contact elements of the respective pairs of feet.

9. In combination, an electrical apparatus, a cabinet containing the same, binding posts on said cabinet affording connections to said apparatus, supplementary electrical apparatus, a casing containing the same, supports for said casing, each support being provided with an aperture at a distance from said casing and of a suitable size to cooperate with said binding posts, and securing means fastening said supports to said casing, said securing means being connected to said supplementary electrical apparatus to constitute the terminals thereof.

10. In combination, an electrical apparatus, a cabinet containing the same, binding posts on said cabinet affording connections to said apparatus, supplementary electrical apparatus, a casing containing the same, supports for said casing, each support having a bearing surface contacting said casing, a spacing length at an angle to said bearing surface, a foot at an angle to said spacing length and a perforation in said foot, the perforations being of suitable size to cooperate with said binding posts, securing means connected to said supplementary electrical apparatus and cooperating with said bearing surfaces to position said supports and a switch member formed on each support on the side of its bearing surface opposite said spacing length.

In testimony whereof, I have hereunto subscribed my name this 12th day of September, 1922.

PAUL M. HENGSTENBERG. 

